Posted by Jim Wilkins on April 24, 2010, 11:29 pm
I didn't mean to imply that YOU should use firewood, if I did it's
because I'm not as good a writer as I'd like to be and practice by
explaining things here.
Posted by Curbie on April 25, 2010, 7:29 am
I didn't feel that you were implying anything, just outlining a
reasonable solution that works for you, I understand that many people
read these threads and having as many options as possible is a good
Thanks for your time and help.
Posted by Jim Wilkins on April 23, 2010, 11:50 am
Jewelers use small rolling mills to thin soft metals:
Needle or roller bearings might be better for high radial loads. You
could look into stub axles for trailers.
Posted by Curbie on April 23, 2010, 1:23 pm
Interesting link, I'd love to repurpose an existing device.
My "mind's eye" can't see the design?
Posted by Jim Wilkins on April 23, 2010, 5:25 pm
The axles become the ends of the rollers. The "wheels" could be a
short pieces of thick-walled tubing counterbored to take the bearings.
Weld them to the frame attachment plates to make DIY pillow blocks.
Mill lengthwise drive key slots in the axles and stack the gears on
outboard of the "wheels", which you make correspondingly thinner. The
axle nut holds the gear and bearings together.
That's if you can't find suitable roller-bearing pillow blocks. A
roller either turned as one piece or built up as a tube with end plugs
strung onto a long shaft is safer because it won't distort from
welding, if you have the money and a large enough lathe.
As for the frame, I can't be responsible for your structural
engineering calculations but IIRC the 12 Ton hydraulic press here uses
3" channel for the frame. The 20 Ton one uses 4" channel.
I couldn't measure the weight (web thickness) of the channel. Rolled
steel structural shapes are sold by width and weight per pound,
controlled by the spacing when they are rolled. In my 1970 steel
construction manual 3" channel weighs 4.1 Lbs / foot, 4" weighs 5.4. I
think other weights are available now.